I tried to log in to Phabricator using my GitHub account, but after entering user name and password correctly, I'm landed on this page https://reviews.facebook.net/oauth/github/login/?code=c440e14489ef15596a83&state= which reads:
GitHub Auth Failed
Unable to authenticate with GitHub. There are several reasons this might happen:
* Phabricator may be configured with the wrong Application Secret; or
* the GitHub OAuth access token may have expired; or
* GitHub may have revoked authorization for the Application; or
* GitHub may be having technical problems.
You can try again, or login using another method.